Top 10 highest paying companies that use FastAPI

35-100 Lakh INR per year; fast-growing, profitable company; AI-first culture and tooling

Fast-growing, profitable real estate company in India building technology for construction and real estate. Mission to build high-quality homes and deliver on time. Engineers have end-to-end ownership impacting supply chain, project management, and customer experience. Looking for product-minded engineers and engineering managers in a small-team, high-ownership, fast-iteration, AI-native environment. Uses Cursor/Copilot and emphasizes AI-first development.

Compensation range: 15-35 lakhs INR per annum along with ESOP.

Jurisphere is currently the leading AI copilot for lawyers in India, and we are planning to rapidly expand to the global market. You will be part of the growth journey where you will ship rapidly to make a product that can beat the likes of Harvey.

CTC ₹20–35 LPA

Riverline is building AI agents for debt collections — think voice + WhatsApp agents that negotiate, resolve, and collect at scale. Backed by South Park Commons, DeVC, and gradCapital. We’re looking for cracked engineers who ship fast and own things end-to-end (frontend → backend → AI integrations). Treat AI tools (Cursor, Copilot, Claude, GPT-5) as part of their daily workflow. Can vibe-code and debug chaos without waiting for perfect PRDs or hand-holding.

Salary $150k-$350k, founding equity, competitive salary, direct founder collaboration, flexible hours, modern tools

AI-powered platform for resume optimization and job application automation. Role: Build technical foundation as the first engineering hire. Own end-to-end features (Python/FastAPI/JS), architect scalable systems, and shape product direction. Ideal for builders who thrive in ambiguity. Requirements: Strong Python fundamentals; Full-stack experience (personal projects count); Product-minded, self-directed, fast learner. Nice-to-have: FastAPI/Django, AI/ML APIs, Stripe, AWS, LaTeX/startup experience. Offer: Founding equity + competitive salary; direct founder collaboration; flexible hours; modern tools. Apply: Email resume + GitHub/portfolio + 3-5 sentence note to info@yourtechresume.com.

Starting $80K base salary + competitive equity, with a clear path to $300K+ total compensation (salary, bonuses, equity, and benefits) based on performance.

Onefish AI is building an offline-first Progressive Web App (PWA) that delivers AI consulting to SMEs using a hybrid architecture combining browser-based Python execution (Pyodide) with intelligent cloud routing. Role: Founding AI Fullstack Engineer to own and build the core hybrid architecture. Responsibilities include PWA service worker architecture, data synchronization, multi-agent LLM design, model optimization for offline performance, and fullstack engineering across browser and cloud runtimes. Required expertise in Python (single-source browser + cloud runtimes), Svelte, Pyodide, FastAPI, Go, PostgreSQL, Docker, and browser ML. This position is on-site/hybrid in San Diego, CA, and offers a Lead Engineer → CTO trajectory. To apply, submit Resume + GitHub + 1-page cover letter + 3 references to jobs@onefish.ai with subject "Candidate: AI Fullstack Engineer - [Your Name]".

$260K - $300K + 0.3-0.41% Equity

Founding-team role building Cofounder, an autonomous agent platform to run end-to-end business workflows. Own the end-to-end agent experience, build and scale Flows and Integrations, and ship across the stack with a focus on performance and reliability. High ownership, zero bureaucracy, maximum impact. Tech stack includes React/Next.js (TypeScript) frontend, Python FastAPI backend, background workers, and Postgres.

$150K–$250K depending on experience

We’re building the OS for legal risk — a real-time AI platform that does legal work (not a co-pilot). Custom knowledge graphs + multi-agent systems = outputs that replace 100s of lawyer-hours. You’ll: - Own and ship full-stack features across SvelteKit, GraphQL, and Python - Work in person with a high-output team, solving real pain points for top law firms - Build AI-native product. Must: - Be NYC-based (or willing to move) - Be serious, fast, and ready to work long hours on hard problems - 2+ years experience. Nice: FastAPI, GraphQL, Tailwind, Svelte, Bun/Deno, AI/ML infra, structured concurrency.

$150k-$250k + equity (SF; location-adjusted)

Piq Energy builds software that helps renewable and large-load developers get projects connected to the electric grid faster. We automate grid interconnection studies and planning workflows. You’ll own features end-to-end: interactive frontend, backend APIs, data pipelines, AI agents, and power systems simulation workflows. We’re looking for experienced generalists who like ownership, real-world impact, and scaling startups.

$150k-$250k base + equity

At Guac, we’re building the first agentic AI platform for grocery. Today, we work with enterprise supermarket chains to forecast demand and help them optimize their inventory operations. We’ve scaled to 7 figures ARR, and we’ve raised $7.2M from YC, Collab Fund, 1984. We’re looking for talented engineers in NYC to join our mission: to solve grocery food waste and tackle food insecurity with technology.

$200k-$250k

Prolific is not just another player in the AI space – we are the architects of the human data infrastructure that's reshaping the landscape of AI development. In a world where foundational AI technologies are increasingly commoditized, it's the quality and diversity of human-generated data that truly differentiates products and models. We’re looking for impact-focused Software Generalists to join our specialized team focused on serving frontier model creators and enterprise AI application developers. As a full-stack engineer, you will work across Prolific’s domains to solve customer and product problems. This is an exciting opportunity to work directly with frontier AI companies, making critical technical decisions that balance scrappy startup execution with scalable, reliable engineering, as Prolific revolutionizes research for the AI community. You'll will have regular in person collaboration with customers and our US team, as well as collaborate closely with our UK-based tech teams. Unfortunately we don't sponsor US visas at this time. Apply: https://job-boards.eu.greenhouse.io/prolific/jobs/4767348101